Industrial salt poisoning is actually nitrite poisoning, the antidote is 5% dextrose added with 1% methylene blue and then injected intravenously, and then apply a large dose of vitamin C, vitamin C can make the high iron hemoglobin reduced to hemoglobin, rapid enema, gastric lavage, diarrhea, let the patient drink a lot of water, the patient should be absolutely bed rest, pay attention to keep warm. Patients should be placed in a well-ventilated environment, and those with respiratory difficulties should be given oxygen. When nitrite enters the human body, hemoglobin forms methemoglobin, which makes hemoglobin lose its ability to carry and supply oxygen, causing tissue hypoxia, when the patient appears in these situations, he should consult a doctor in time.